Breakpoints

Which power-up actually adds damage per hit?

Levels that add

Mewtwo · Psycho Cut

Level 31+1 hit survived · Psycho Cut does 2 to you
Level 32.5+1 hit survived · Psycho Cut does 2 to you
Level 34+1 hit survived · Psycho Cut does 2 to you
Level 35.5+1 hit survived · Psycho Cut does 2 to you
Level 37+1 hit survived · Psycho Cut does 2 to you
Level 38.5+1 hit survived · Psycho Cut does 2 to you
Level 40+1 hit survived · Psycho Cut does 2 to you
Level 41.5+1 hit survived · Psycho Cut does 2 to you
Level 43+1 hit survived · Psycho Cut does 2 to you
Level 44.5+1 hit survived · Psycho Cut does 2 to you
Level 46.5+1 hit survived · Psycho Cut does 2 to you
Level 48+1 hit survived · Psycho Cut does 2 to you
Level 49.5+1 hit survived · Psycho Cut does 2 to you

Next breakpoint: level 44.5, where Bite goes from 8 to 9.

How it's worked out

Damage is floored, so it is a staircase, not a ramp: several power-ups can change nothing and then one adds a point. Each level calls the raid simulator's own damage formula, floor(0.5 x power x atk/def x STAB x type x modifiers) + 1, with the attacker at that level and the boss at its tier (15/15/15 IVs, tier CP multiplier). Weather, friendship and the Shadow multipliers are the simulator's constants. Incoming damage carries no friendship bonus, and a Shadow attacker takes its 0.83x defense penalty.